Tool for bushing ends of metallic tubes.



Patented Jan. 9, I900.

E. T. GREENFIELD. TOOL FOR BUSHING ENDS 0F METALLIC TUBES.

(Application filed Aug. 80, 1899.)

(No Model.)

UNITE STATES Farce.

PATENT EDWIN T. GREENFIELD, 'OF NEW YORK, N. Y.

SPECIFICATION formingpart of Letters Patent NO. 640,759, dated January 9, 1900.

Application filed August 30, 1899. Serial No. 728,956. (No model.)

To ctZZ whom it may concern:

Be it known that I, EDWIN T. GREENFIELD, a citizen of the United States, residing at New York, borough of Manhattan, county and State of New York, have made a new and useful Invention in Tools for Bushing the Ends of Metallic Tubes, of which the following is a specification.

My invention relates particularly to improvements in tools for bushing or lining the ends of metallic conduitssuch, for instance, as is disclosed in United States Patent No. 630,501, granted to me on the 8th day of August, 1899'; and its object is to provide a tool which will quickly and permanently affix to the inner ends of such tubular conduits a smooth metallic bushing which when in place will prevent any damaging effect from jagged ends to insulated wires when drawn therein, as is often the case when the ends of such tubes are sawed and the burred or jagged parts left exposed.

p In a prior application bearing Serial No. 724,060, filed on the 17th day of July, 1899, I have described, shown, and claimed a metallic tube provided with protecting-bushings at its ends, and no claim is herein made to any such feature, the subject-matter hereof being directed solely to the tool for securing such bushings in place, as hereinafter described,

but more specifically defined in the claims at the end of this specification.

Referring to the drawings for a full and clear understanding of the invention, such as will enable others skilled in the art where such tools are used to construct and use the same, Figure 1 illustrates, in part side elevational part longitudinal sectional view, one form of the novel tool for bushing the ends of metallic tubes, said tool being shown in position in the end of a flexible metallic tube and with a bushing in place to be secured thereto. Fig. 2 is a view similar to Fig. 1, illustrating a preferred modified form of the tool and its application. Fig. 3 is an end view of Fig. 2 as seen looking thereat from the left toward the right hand side of the drawings, the flexible tube and bushing, however, being removed.

In all the figures of the drawings like letters represent like or equivalent parts.

In Fig. 1, D is the body part of the tool, con sisting of a metal rod cone-shaped or tapered,

as shown at E, and having at one end-an operating-handle H and at the other a cap J. This tapered part E is adapted to slide longitudinally through a tube having a collar M, the body part of said tube being slitted and the free ends F F F F turned outward, so as to constitute when held closely together an end flange adapted to be forced against the end of the bushing, so as to effectually secure it to the end of the tube. A B represent a short section of flexible metallic tubing like that disclosed in United States Pat ent No. 630,501, granted to me on the 8th day of August, 1899. 0 represents a soft-metal bushing, such as lead or type-metal, approximating in exterior diameter the inner diameter of the tube A B, and I is an end flange adapted to rest, when in position, against the end of the tube to be bushed. This bushing is slipped over the end of the tool and then inserted in place within the end of the tube to be bushed, after which, by rotating and simul taneously forcing the tool toward the end of the tube, the bushing is secured to the inner end thereof.

In the preferred modified form illustrated in Figs. 2 and 3 the collar M is interiorly screw-threaded, and the corresponding end of the body part D has a male screw-thread S, the arrangement being such that when the bushing-ring G is in place and the body part rotated by the handle H the tapered part E will spread the outwardly-turned ends F F F F, the tool being held by the operator from rotating by lugs L L. After the bushing is thus forced in place the tool is removed by reversing the action of the screw.

I do not limit myself to the specific struc tures herein shown and described for bushing the interior and ends of metal or other tubes having jagged or cutting projections, such as usually result from the sawing of metaltubes or pipes, as I believe I am entitled to claim,

broadly, an expansible bushing-tool adapted I claim, and desire to secure by Letters Patent of the United States, is-

1. As an article of manufacture an expansible bushing-tool for inserting bushings in the ends of tubes consisting of a slitted tube and a cone-shaped expander, the free ends of the slitted tube being bent outward so as to constitute a sealing-flange for securing the bushing against the end of the tube, said parts being held together at their inner ends and adapted to slide the one through the other.

2. As an article of manufacturee bushingtool consisting of a slitted tube interiorly sorew-threaded, a, cone-shaped expander having a corresponding male screw-thread and an operating-handle, the slitted tube being provided with In gs or arms for holding the tool from turning.

3. As an article of manufactures, bushingtool consisting of a slitted tube havinga screwthreaded collar M and outwardly-turned ends F F F with holding-lugs L L, in combination with a cone-shaped body part screw- 

